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Articles by Stephan Bartling
Iron-based single-atom catalysts for selective ammoxidation of C( sp 3 )–H bonds and oxidative C–C cleavage reactions
Abstract Ammoxidation of methylarenes using ammonia and air is the main method for the synthesis of aromatic nitriles in the chemical industry. Despite significant efforts in industry and academia, no general and selective catalyst based on less toxic and earth-abundant metals has been developed for this reaction. Here we report a single-atom iron-based material (Fe@BNC-800-L1) with Fe–N5–Bx configuration as an efficient sp3-hybridized C–H- and C–C bond oxidation catalyst.
Highly selective and practical hydrogenation of functionalized (hetero)arenes - Nature Communications
Abstract Arenes, and particularly heteroarenes are integral structural components of a variety of chemicals and represent a privileged class of bioactive compounds found in pharmaceuticals, agrochemicals and vitamins. Diastereoselective hydrogenation of multi-substituted (hetero)arenes offers an efficient and industrially relevant approach to convert these compounds into valuable, diversified 3D building blocks for applications for example in drug innovation.
Mixed-valence Co0/IIOx clusters on silicalite-1 facilitate propane dehydrogenation to propene - Nature Catalysis
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Abstract Understanding the nature of active sites in heterogeneous catalysts and how to create them purposefully opens up the possibility of tailored catalyst design. Here we report mixed-valence subnanometre CoOx clusters, consisting of a few metallic Co0 atoms on top of Co2+, bound to a silicalite-1 support through lattice oxygen atoms as active species for non-oxidative propane dehydrogenation (PDH) to propene.
By Qiyang Zhang, Yuming Li, Xinxin Tian, Vita Kondratenko, Elizaveta A. Fedorova, Xiangnong Ding, Dmitry E. Doronkin, Dan Zhao, Chun Deng, Huihui Chen, Shutao Xu, Anna Zanina, Stephan Bartling, Tatiana Otroshchenko, Yajun Wang, Zhen Zhao, Chunming Xu, Guiyuan Jiang, Haijun Jiao, Evgenii V. Kondratenko
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Nature
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Hydrogenation of CO2 to Methanol over Amine‐Doped Ordered Mesoporous Polymers Under Dynamic Reaction Conditions
1 Introduction Carbon dioxide, a major greenhouse gas, plays a substantial role in global warming and climate change. Rapid industrialization in recent decades has accelerated the atmospheric CO2 accumulation, thus intensifying the greenhouse effect.[3] Transforming CO2 into value-added carbon-based products, such as hydrocarbons,[4] carboxylic acids,[5] and alcohols,[6] offers a promising strategy to mitigate CO2 emissions.
Atomically Dispersed Palladium Promoted Suzuki-Miyaura Cross Coupling
1 Introduction The Suzuki–Miyaura reaction is a key step in the total synthesis of natural products and pharmaceuticals.[1] To date, palladium remains the most effective metal for driving this reaction.[2] Substantial progress has been made in recent years in the development and implementation of heterogeneous Pd catalysts.[3] For example, the synthesis of Sitagliptin, an active pharmaceutical ingredient used to treat type 2 diabetes, involves a large-scale Suzuki coupling reaction using...
Formation and Role of Iron-Containing Phases in CO2 Hydrogenation to Higher Hydrocarbons
1. Introduction Click to copy section linkSection link copied! Reducing CO2 emissions, the main greenhouse gas produced by human activities, is necessary to counteract the anthropogenic contribution to climate change. A viable option for closing the carbon cycle is to convert CO2 into value-added products.
Understanding Mn-modulated restructuring of Fe-based catalysts for controlling selectivity in CO2 hydrogenation to olefins - Nature Catalysis
Abstract For CO2 hydrogenation over iron-based catalysts, revealing the promoting effect of manganese and the nature of catalytically active sites remains a challenge that hinders targeted catalyst design. Here we elucidate the manganese-modulated restructuring of such catalysts during preconditioning and CO2 hydrogenation using in situ X-ray absorption spectroscopy.
The Role of Reducibility of PtGaO x ‐based Catalysts for Efficient and Durable Propane Dehydrogenation
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Effect of Bi2MoO6 Morphology on Adsorption and Visible-Light-Driven Degradation of 2,4-Dichlorophenoxyacetic Acid
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Development of Iron‐Based Single Atom Materials for General and Efficient Synthesis of Amines
Introduction The development of new materials with improved chemical and physical properties is a prerequisite to achieve a sustainable and circular economy in the next two decades.1-3 In this respect, the preparation of such materials using abundant and inexpensive feedstocks is crucial.
Fundamental structural and electronic understanding of palladium catalysts on nitride and oxide supports
Supporting Information As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors.
Fundamental Structural and Electronic Understanding of Palladium Catalysts on Nitride and Oxide Supports
Introduction Understanding how the support influences the reactivity of single-atom catalysts (SACs) remains a challenge. The support, to some extent, resembles the organic ligands in a homogeneous complex, and the ligands dictate the electronic properties and reactivity of the metal center.1 Recent work done by Muravev et al. on cerium dioxide (CeO2)-supported Pd SACs proved that the size of CeO2 support governs the reactivity of isolated Pd species in CO oxidation.2 Another work by Hulva et al.
Investigations into the influence of nickel loading on MoO3-modified catalysts for the gas-phase hydrodeoxygenation of anisole
Investigations into the influence of nickel loading on MoO3-modified catalysts for the gas-phase hydrodeoxygenation of anisole Molybdenum oxide-based catalysts are promising catalysts for the gas-phase hydrodeoxygenation (HDO) of lignocellulosic pyrolysis oils with high selectivities to arenes. The gas-phase HDO is conducted at temperatures between 300 °C and 400 °C at ambient pressure, resulting in a low hydrogen consumption and high energy efficiency.
Stabilization of Intermediate Mo Oxidation states by Nb Doping Enhancing Methane Aromatization on Mo/HZSM-5 Catalysts
Stabilization of Intermediate Mo Oxidation states by Nb Doping Enhancing Methane Aromatization on Mo/HZSM-5 Catalysts The methane dehydroaromatization is a promising process to produce aromatics and COx-free hydrogen from naturally abundant methane. Low-temperature activity, regenerability and time-on-stream stability are fundamental challenges for industrial use of the commonly studied benzenoid-selective Mo/HZSM-5 catalysts.
Mechanism and selectivity of MOF-supported Cu single-atom catalysts for preferential CO oxidation
Mechanism and selectivity of MOF-supported Cu single-atom catalysts for preferential CO oxidation† Zr-based UiO-66 metal–organic frameworks are ideal platforms for the design and development of heterogeneous single-atom catalysts (SACs) because of their thermal and chemical stability with the presence of structural defects, enabling the introduction of isolated metal atoms.
A general and robust Ni-based nanocatalyst for selective hydrogenation reactions at low temperature and pressure
A general and robust Ni-based nanocatalyst for selective hydrogenation reactions at low temperature and pressure Abstract Catalytic hydrogenations are important and widely applied processes for the reduction of organic compounds both in academic laboratories and in industry. To perform these reactions in sustainable and practical manner, the development and applicability of non-noble metal–based heterogeneous catalysts is crucial.
Heterogenized Molecular Electrocatalyst Based on a Hydroxo‐Bridged Binuclear Copper(II) Phenanthroline Compound for Selective Reduction of CO2 to Ethylene
Molecular copper catalysts have emerged as promising candidates for the electrochemical reduction of CO2. Notable features of such systems include the ability of Cu to generate C2+ products and the well-defined active sites that allow for targeted structural tuning. However, the frequently observed in situ formation of Cu nanoclusters has undermined the advantages of the molecular frameworks.
Reusable Co-catalysts for general and selective α-alkylation of nitriles with alcohols
Reusable Co-catalysts for general and selective α-alkylation of nitriles with alcohols A general cobalt-catalyzed α-alkylation of nitriles with alcohols is reported. Utilizing this straightforward borrowing hydrogen methodology, a series of substituted and functionalized nitriles can be easily coupled with benzylic, heterocyclic, and aliphatic alcohols to prepare diverse functionalized nitriles in good to excellent yields (>70 examples).
Mechanism and selectivity of MOF-supported Cu single-atom catalysts for the preferential CO oxidation
Mechanism and selectivity of MOF-supported Cu single-atom catalysts for the preferential CO oxidation Zr-based UiO-66 metal-organic frameworks are ideal platforms for the design and development of heterogeneous single-atom catalysts (SACs) because of their thermal and chemical stability with the presence of structural defects, enabling the introduction of isolated metal atoms.
A Cobalt nanocatalyst for the hydrogenation and oxidative dehydrogenation of N‐heterocycles
Supporting Information As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors.
A Cobalt Nanocatalyst for the Hydrogenation and Oxidative Dehydrogenation of N‐heterocycles
Introduction The synthesis of both saturated and unsaturated N-heterocycles are important methodologies in organic synthesis.
Experiment and Theory in Concert To Unravel the Remarkable Electronic Properties of Na-Doped Eu11Zn4Sn2As12: A Layered Zintl Phase
Download Hi-Res ImageDownload to MS-PowerPointCite This:Chem. Mater. 2023, XXXX, XXX RETURN TO ARTICLES ASAPPREVArticleNEXT Ashlee K. Hauble Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States , Michael Y. Toriyama Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States , , , * , and * Cite this: Chem. Mater. 2023, XXXX, XXX Copyright © 2022 The Authors.
Tailoring Active Cu2O/Copper Interface Sites for N‐Formylation of Aliphatic Primary Amines with CO2/H2
Introduction The replacement of fossil carbon resources by renewable ones is a major challenge to develop sustainable chemistry.
Hydrogenation of Epoxides to Anti‐Markovnikov Alcohols over a Nickel Heterogenous Catalyst Prepared from Biomass (Rice) Waste
Abstract The synthesis of primary alcohols (from olefins) is an important and challenging transformation, as most of the current methods suffer from regioselectivity issues. This work describe the utilization of rice husk (RH) from agricultural waste as support for the preparation of a catalyst for the conversion of olefin oxides to primary alcohols. The catalyst was synthesized by pyrolysis of RH impregnated with nickel, and characterized by IR, AAS, XRD, BET, XPS, TEM, and TPD technics.
Stable and Reusable Ni-based Nanoparticles for General and Selective Hydrogenation of Nitriles to Amines
Stable and Reusable Ni-based Nanoparticles for General and Selective Hydrogenation of Nitriles to Amines Zhuang Ma, Matthias Beller, Stephan Bartling, Nils Rockstroh, Jagadeesh Rajenahally, Bei Zhou, Vishwas Chandrashekhar and Asma AM Alenad Abstract Abstract: Silica supported ultrasmall Ni-nanoparticles allow for general and selective hydrogenations of all kinds of ni-triles to primary amines under mild conditions.
The solvent determines the product in the hydrogenation of aromatic ketones using unligated RhCl3 as catalyst precursor
The solvent determines the product in the hydrogenation of aromatic ketones using unligated RhCl3 as catalyst precursor You have access to this article Please wait while we load your content... Something went wrong. Try again?
Operando detection of single nanoparticle activity dynamics inside a model pore catalyst material
Abstract Nanoconfinement in porous catalysts may induce reactant concentration gradients inside the pores due to local conversion. This leads to inefficient active material use since parts of the catalyst may be trapped in an inactive state. Experimentally, these effects remain unstudied due to material complexity and required high spatial resolution.
Synergistic effect of VOx and MnOx surface species for improved performance of V2O5/Ce0.5Ti0.5-xMnxO2-δ catalysts in low-temperature NH3-SCR of NO
Supported V O /Ce Ti Mn O (x = 0, 0.01, 0.05, 0.1, 0.2) catalysts and bare supports were investigated in the selective catalytic reduction (SCR) of NO by NH between 100 and 300 °C. Incorporation of Mn into Ce Ti O increased the NO removal efficiency, reaching both NO and NH conversions above 85 % between 175 to 300 °C at remarkably high N selectivities of ≥ 95 %. Moreover, Mn-modified supports were also much more stable against deactivation in the presence of water.
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